What Matagorda County, TX's soil rates for a septic system

Very limited

Soil across 74.3% of Matagorda County, TX rates "Very limited" in USDA's septic-absorption-field interpretation. Practically, that rules out a simple gravity system for most of the county - 74.3% of it sits in USDA's most-constrained bucket. Matagorda County, TX is 1,093.131 square miles with a population of 36,391.

What Matagorda County's reading doesn't cover

Nothing about Matagorda County, TX's SSURGO figure applies to a specific address - it's a county-wide average. A local percolation test, typically $750-$1,850 (around $1,300 typical), is the only way to know what one lot in Matagorda County will actually do.

What a system would cost here

With 74.3% of Matagorda County rating "Very limited", a standard gravity system is not a safe assumption here. The engineered-system range, $10,000-$40,000 (mound or aerobic treatment), is the more realistic number to plan around, against $3,000-$8,000 for a conventional system on the rare lot that passes.

Where this sits nationally

Nationally, Matagorda County, TX is the 2,319-most-constrained of 3,058 rated counties for septic soil. Within Texas alone it ranks 182 of 253.

Before you act on this

How this rating is built, and its real limits · Conventional vs. engineered septic systems